UE4 flips my model "inside out" (normals) while importing a fbx and won't let me "fix" it

[Joookerasny]

@Nawrot

I did not work with blender, but some search results that are worth checking:

" My guess would be that your object has negative scale in Object mode. As .obj does not store object transforms, the scale is applied on export and so causes the normals have negative direction as well.
To fix this, in Object mode hit Ctrl + A > Scale, then do the operation described in answer you already found (in Edit mode hit Ctrl + N) and then re-export.

"

The scale was indeed negative and this caused an issue. Thank You and everyone else here for replies!